← Years 5–6 Digital Systems

LAN and WAN

A LAN connects devices in one small area like a home or school. A WAN connects many LANs over a large distance. The internet is the largest WAN.

Part of: 5-6 Digital Technologies Vic Curric - Digital Systems & Security — Module 26, 7-8 Digital Technologies Vic Curric - Digital Systems and Security — Module 30, IGCSE Computer Science 0478 — 3.4 Network Hardware — Module 2, ACARA Digital Technologies Years 5–6 — Networks and Sharing Data — Module 15, ACARA Digital Technologies Years 7–8 — Wired and Wireless Networks — Module 5, ACARA Digital Technologies Years 9–10 — Networked Systems and Access Control — Module 4, WA Computer Science ATAR Year 11 — Network Communications — Module 4, WA Computer Science ATAR Year 11 — Cyber Security — Module 13

Understanding LAN and WAN in Years 5–6 Digital Systems

What it does: Devices connected in one small area like a school form a LAN. The internet is the biggest WAN because it connects LANs across the whole world. A WAN (Wide Area Network) spreads across cities, countries or even the world. The internet links millions of LANs and other networks, so it is the largest WAN. A WAN connects many LANs together over a large distance. The two schools are far apart, so a WAN is needed to connect their LANs. A home network covers one small area, which makes it a LAN. WANs link many LANs across big distances, while one classroom is a LAN.

Common mistakes: A LAN covers one small area such as a home or school, so lan_area should be "small". A large area is what a WAN covers. A WAN joins many LANs, so it should start as an empty list (wan = []). A number has no append() method, so the next lines would fail.

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This module's key terms are also in a printable crossword (Modules 21–30) and word search (Modules 21–52).

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Learning
Duo
Which network connects devices inside one school building?
WANLAN
Matches
home_wifi = WAN
↓
A home Wi-Fi network connects devices in one small area, so it is a LAN, not a WAN. It should be home_wifi = LAN.
Applying
Meanings
Term
LAN vs WAN
Meaning
A LAN connects devices in one small area like a home or school. A WAN connects many LANs over a large distance. The internet is the largest WAN.
Practice
Type out real code from this module.
Testing
Gaps
homeNetwork ←
Check Answer
Spots
1lan_area = "large"
2wan_area = "large"

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Quick Questions

1. Which network connects devices inside one school building?
A. LAN ✓
B. WAN
A LAN (Local Area Network) covers a small area such as a school or home.
2. Which statement is true?
A. A WAN only connects devices in one room
B. A WAN connects networks over a large distance ✓
A WAN (Wide Area Network) spreads across cities, countries or even the world.
3. Your family's laptops, phones and printer all share the home Wi-Fi. What type of network is this?
A. A home LAN ✓
B. A WAN
Devices in one house are in a small area, so they form a LAN.
4. What is the internet?
A. The largest WAN, joining many networks around the world ✓
B. A very large LAN in one building
The internet links millions of LANs and other networks, so it is the largest WAN.
5. A WAN can be made by joining many what?
A. Single keyboards
B. LANs ✓
A WAN connects many LANs together over a large distance.

Match the Pairs

LAN → A network that connects devices in one small area, such as a home or a school
WAN → A network that connects many LANs across a large distance, such as between cities or countries
A school's computers, printers and tablets all joined together inside the one school grounds → school_network = LAN
The internet joins millions of LANs all around the world, making it the largest network of its kind → internet = largest WAN
home_wifi = WAN → A home Wi-Fi network connects devices in one small area, so it is a LAN, not a WAN. It should be home_wifi = LAN.
WAN = devices in one classroom → A WAN connects networks over a large distance, not just one classroom. A single classroom network is a LAN.

Key Term

LAN vs WAN
A LAN connects devices in one small area like a home or school. A WAN connects many LANs over a large distance. The internet is the largest WAN.

Fill in the Blanks

1. homeNetwork ← LAN
Hint: Type the network type that connects devices in one home.
2. countryNetwork ← WAN
Hint: Type the network type that covers a large distance between places.
3. IF area = small THEN schoolNetwork ← LAN ENDIF
Hint: Type the network type used for a small area like a school.
4. IF area = large THEN network ← WAN ENDIF
Hint: Type the word that describes the size of area a WAN covers.
5. IF network = internet THEN type ← largest WAN ENDIF
Hint: Type the network type that the internet is the largest example of.

Spot the Error

Question 1
A lan_area = "large"
B wan_area = "large"
C print(lan_area, wan_area)
Line A — A LAN covers one small area such as a home or school, so lan_area should be "small". A large area is what a WAN covers.
Question 2
A wan = 0
B wan.append("school LAN")
C wan.append("home LAN")
D print(len(wan))
Line A — A WAN joins many LANs, so it should start as an empty list (wan = []). A number has no append() method, so the next lines would fail.
Question 3
A network = "school LAN"
B covers = "many countries"
C print(network, covers)
Line B — A LAN covers one small area such as a single building. Covering many countries describes a WAN, so it should be "one building".
Question 4
A home_lan = "LAN"
B internet = "LAN"
C print(home_lan, internet)
Line B — The internet is the largest WAN, not a LAN. Line 2 should be internet = "WAN".
Question 5
A area = "small"
B if area == "small":
C print("WAN")
Line C — A small area such as a home or school is a LAN. A WAN covers a large distance, so this should print "LAN".

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